# CVE-2026-77997: Missing authorization in YOOtheme Pro extension for Joomla

> Authenticated users with template editing permissions can access unauthorized module information due to missing access checks in YOOtheme Pro.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/S:N/AU:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Aug 2026
- **Updated:** 26 Aug 2026
- **Also known as:** GHSA-84hx-8vrm-hqm7

## What is CVE-2026-77997?

CVE-2026-77997 is a medium-severity missing authorization vulnerability in yootheme.com YOOtheme Pro extension for Joomla, published on 25 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Joomla Extension - yootheme.com - Authenticated, privileged information disclosure in YOOtheme Pro 1.0.0-5.0.41 - A missing access check allowed users with com_template editing permissions to access information about arbitrary modules without the respective com_modules permissions.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-77997?


## How do I fix CVE-2026-77997?

No fix has been published for CVE-2026-77997 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77997 being exploited?

There is no known exploitation of CVE-2026-77997 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77997 and fix it if it is affected.

What it is: CVE-2026-77997 is a medium-severity missing authorization vulnerability in yootheme.com YOOtheme Pro extension for Joomla, published on 25 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-77997 in the wild and no public exploit code.

Affected product: yootheme.com YOOtheme Pro extension for Joomla. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-77997/ (Markdown: https://insights.sbomify.com/CVE-2026-77997/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77997
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77997
- OSV: https://osv.dev/vulnerability/CVE-2026-77997

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77997/
Summaries are generated and may contain mistakes; the official description above is the record.